Re: gEDA-user: SMD soldering challenge status

[John Coppens <john@xxxxxxxxxxxx>]

On Sat, 5 Aug 2006 09:34:20 -0400
DJ Delorie <dj@xxxxxxxxxxx> wrote:

> >    Even just a little 555-based LED blinker or something would count
> > as "functional" in this case, I think.
> 
> 0603 cap = 1 cent
> 0603 led = 7 cents
> 
> Even the venerable 555 is too expensive in the small sizes appropriate
> to this project (about $0.60).
> 
> Now, if you can think of a circuit that uses a flip flop and some
> inverters, plus low-valued caps (even resistors cost 3x what caps
> cost), that might be feasible.

Yes - and think about being able instantly identify if the soldering was
successful or not by seeing the LED blink. 'Built-in diagnostics'...
That's at least worth another $.02?

John


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